NAME

comb − Combines Source Code Control System (SCCS) deltas

SYNOPSIS

comb [-clist] [-os] [-pSID] file ... 

The comb command writes to standard output a shell procedure for combining the specified deltas (SIDs) of an SCCS file and creating a new version of the file with fewer deltas. 

FLAGS

Each flag or group of flags applies independently to each named file. 

-clistSpecifies a list of deltas (SIDs) that the shell procedure will preserve (see get -ilist).  The procedure will combine all other deltas. 

-oAccesses the reconstructed file at the release of the delta to be created for each get -e generated; otherwise, accesses the reconstructed file at the most recent ancestor.  Using the -o flag may decrease the size of the reconstructed SCCS file.  It may also alter the shape of the delta tree of the original file. 

-pSIDSpecifies the SID of the oldest delta for the resulting procedure to preserve.  All older deltas are combined in the reconstructed file. 

-sCauses comb to generate a shell procedure that, instead of combining the deltas, produces a report for each file, which lists the filename, size (in blocks) after combining, original size (also in blocks), and percentage change computed by the following formula:

100 ∗ (original - combined) / original

Run comb using this flag before actually combining SCCS deltas in order to judge how much space will actually be saved by the combining process. 

DESCRIPTION

By piping the output of comb to a shell, or redirecting the output to a file and running that file as a shell procedure, you can reduce the size of your SCCS file. You can first see how much the file will be reduced by running comb with the -s flag. 

If you specify a directory in place of file, comb performs the requested actions on all SCCS files (that is, those with filenames with the s. prefix).  If you specify a - (dash) in place of file, comb reads standard input and interprets each line as the name of an SCCS file.  comb continues to take input until it reads End-of-File. 

If you do not specify any flags, comb preserves only leaf deltas and the minimal number of ancestors needed to preserve the tree (see the delta command). 

The comb command may rearrange the shape of the tree deltas. 

The comb command may not save any space; in fact, it is possible for the reconstructed file to actually be larger than the original. 

EXAMPLES

     1.To  generate a report on how much space will be saved by combing all deltas older than SID 1.4 for SCCS file s.test.c, enter:

comb -p1.4 -s s.test.c | sh

     2.To actually combine the deltas, enter:

comb -p1.4 s.test.c | sh

FILES

s.COMB$$

comb$$Temporary files. 

RELATED INFORMATION

Commands:  admin(1), cdc(1), delta(1), get(1), prs(1), rmdel(1), sact(1), sccsdiff(1), sccshelp(1), unget(1), val(1), what(1). 

Files:  sccsfile(4).